try not to hardcode the location of your embedded flash. kay stricto na ang flash when it comes to cross-domain access. kay i noticed you embedded the flash without the "www".
but if you access the site thru "http://matr.com/" your flash menu works fine. it just doesn't work if you place "www" on the URL.
so in order to fix this, just add "www" on your embed code, or just simply not hardcoding your embed code...
Code:
instead of
<embed src="http://matr.com/templates/matr/swf/navbar.swf"
use
<embed src="templates/matr/swf/navbar.swf"
or
<embed src="http://www.matr.com/templates/matr/swf/navbar.swf"
and same goes to the rest of the parameters on the object tag.